495021 has 8 divisors (see below), whose sum is σ = 664864. Its totient is φ = 327600.

The previous prime is 495017. The next prime is 495037. The reversal of 495021 is 120594.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 495021 - 2² = 495017 is a prime.

It is a Duffinian number.

It is a Curzon number.

495021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55 + ... + 996.

It is an arithmetic number, because the mean of its divisors is an integer number (83108).

2⁴⁹⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

495021 is a deficient number, since it is larger than the sum of its proper divisors (169843).

495021 is a wasteful number, since it uses less digits than its factorization.

495021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 495021 is about 703.5772878654. The cubic root of 495021 is about 79.1057175697.

The spelling of 495021 in words is "four hundred ninety-five thousand, twenty-one".